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(No Model.) 2 Sheets-Sheet 1.

O. MULLER. VENTILAQTOR.

Noqzwflov. Patented Apr. 29, 1884;

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N. PETERS Plwlo-Lilhugflphbr. wdshingun. D4 C.

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conRAn MULLER, OF HAMBURG, GERMANY.

VENTI LATO R.

SPECIFICATION forming part of Letters Patent No. 297,707, dated April 29, 1884. Application filed May 28, 1883. (No model.) Patented in Germany September 28, 1882, No. 22,015.

To all whom it may concern:

tilators, by which rooms, building's, ships, or'

other structures or places can be ventilated by the automatic action of the apparatus forcing fresh air into and carrying at the same time bad air out of the room, building, ship, or other structure or place.

The improvement consists in the combination, with inlet and outlet tubes arranged one withinthe other, of a cowl of novel construction, hereinafter described.

Figure 1 is a side elevation of a ventilator constructed according to my invention. Fig. 2 is a vertical section of the same. Fig. 3 is a front of the same ventilator, exhibiting a modification of the inlet and outlet tubes. Fig. 4 is ahorizontal section in the linexm of Figs. 1, 2,3.

m n are two stationary concentrical tubes or channels, of which the inner one, m, is the inlet for fresh air, the outer one the channel carrying the bad air away from the room. Over these tubes is fitted the upper part or cowl of the apparatus, which is centered on a stationary rod, w, securedto the center tube, m, by brackets s s, and partly supported on rollers a a, attached to the outer tube, a, so that it may be turned freely by the action of the wind on a vane attached to its crown. This cowl is of circular horizontal section, and is divided vertically and centrally by a partition, 15. (See Figs. 2 and 4:.) The portion of the cowl in front of this partition, which the action of the vane constantly turned toward the wind, is constructed or provided with a number of semicircular sheet-metal funnels, r r, mounted a certain distance apartone above the other as shown in Fig. 2, so that all communicate with the inlet-tube m, which tube may be furnished at its bottom with a valve, a, for regulating or closing the opening of the inlet, as may be desirable. The partition t, which forms the back of these funnels, shuts them off from the outlet-tube n. The back of the cowl on the opposite sideof the partition 25 is sur-- rounded by a semicircular mantle, O, that is V formed slightly eccentric, as shown in Fig'. 4,

widening toward the front, where it is open at the side edges of the partition-plate t,while at its bottom it is, contracted toward and is supported by the outer tube or casing, a, with which it communicates. At the top this mantle is connected to a cap or crown, K, which is also connected to the partition-wall t, that connects and forms the back of the funnels before described. This crown of the mantle is at the hinder side furnished with one or more openings, Z, through which the bad air exits into the open air. The mantle is fitted at the back of the partition t and opposite the funnels 1" r with a series of inverted funnels, "Z t, which form communication between the outer tube, at, and the opening 01; openings Z. The front openings of the mantle at the side edges of the partition-plate t are fitted with inclined deflectors 10 p, to cause the wind blowing into the openings to be deflected upward.

front openings at 1) p at the sides of the funnels,

and passing out at Z. This current of wind,

rushing through the semicircular mantle,pro-

duces in thehinder part of the cowl and through the inverted funnels it a draft of air in upright direction, (the reverse of the draft in front of the apparatus,) and as the mantle is. at its bottom end in connection with the outer channel or tube, a, the foul or bad air will be ejected through the latter. The outer tube or channel, a, may, at its bottom part,be likewise furnished with a regulating-valve, that may be closed more or less, as desirable. v

If the ventilator cannot be directly fastened to the roof or to the deck E of the room or vessel that has to beventilated, as shown in Figs. 1 and 2, the bottom ends of the concentrical tubes or channels at n can be separated and be carried to separate chimneys or channels communicating with the room or building, 8m, in question, as shown in the lower part of Fig. 3. p

I do not claim, broadly, the combination, with inlet and outlet fines or tubes, of a cowl applied thereto, for producing a downward current through the inlet-tube and an upward current through the outlet-tube; but

hat I claim as my invention is 1. The combination, with stationary inlet and outlet tubes m aone within the otherof a cowl having a central partition, t, and a cap or crown, K, with which said partition is connected, and having on one side of said par tition a series of funnels, r r, communicating with the inlet-tube m, and on the other side a series of inverted funnels, z t, communicating with the outlet-tube a, substantially as herein described.

2. The combination, with stationary inlet and outlet tubes m 7I --Ol16 within the other of a cowl having a central partition, t, and a cap or crown, K, with which said partition is connected, and having on one side of said partition a series of funnels, 1' 1', communicating with the inlet-tube m,-and on the other side a series ofinverted funnels, z" i, communicating with the outlet-tube n, and a mantle, O, inclosing said funnels, open at the edges of the partition t, and communicating with an opening,- 1, provided in the cap or crown K on the same side of the partition t substantially as herein described.

CONRAD MULLER. Vitnesses:

F. ENGEL, F. CLAIRMONT. 

